Reaming-tool



G. MIZZELL.

REAMING TOOL.

APPLxcATlo N FILED 1AN.18, 1921.

Patented Oct. 11, A1921.

Q www@ INVENTOR, GM/ZZEL L. B Y

"A TTORNEYS7 UNITED STATES PATIENTA OF-FICE. y

l GEORGE MIZZELL, 0F NEWPORT NEWS, VIRGINIA, ASSIG-NOR OF ONE-HIJF TO A.T.

2 MERRITT, OF NEWPORT NEWS, VIRGINIA.

REAMING-TOOL.

Application led January 18, 1921.

To all whom 'it may concern:

Be it known that I, GEORGE MizznLL, a citizen of the United States,residing at New ort News, in the county of Warwick land IS)tate.ofVirginia, have invented certain new and useful Improvements in Roaming-Tools; and I do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same.

This invention relates to new and useful improvements in rea-ming tools,and' more particularly to a reamer adapted for use in countersinkingopenings in the shell plates, tanks and other heavy metal plates used inconnection with thebuilding of ships, the

main object yof the present invention being the provision of a reamingtool whereby the cutting knife can be arranged in such a position as. topermit the insertion offthe reaming tool within the opening for reamingout the side of the opening opposite the operator, means being provided'to'arrange the cutting blade in operative position after the tool hasbeen lextended through the opening.

In the reaining out of openin s in tanks and similar structures itgenera y requires the services of an operator upon the `inside of thetank, with the tool in use at the present time, this operator ontheinside arranging the cutting blade in position after the tool has beeninserted through the opening by the operator upon the opposite side andit is the inain'obje'ct or my invention to provide a reaming toolwherein the knife blade will be normally arranged` within the connes ofthe tool So that it can be readily inserted through an opening .and thenarranged in operative position for `reaming out-the opening upon theside opposite from which the operator is working.

' A further-object of my invention is the provision of new and 'novelVmeans whereby a single blade cutter can be readily operated to arrangethe same within the tool when not in use and again re-arrange the saineto extend the cutting blade to its operative position, and furthermoreproviding means whereby when pressure is exerted upon the cuttingblade', a suitable bearing will be ,provided -ior'tlie blade to releasethe strain Specification of Letters Patent.

Patented oct. 11, 1921.

Serial No. 438,131.

With the above and other objects in view the invention consists in thenovel features of construction, combination and arrangement" of partshereinafter more fully set forth, pointed out in the claims and shown inthe accompanying drawingsy in which:

Figure ,l isa longitudinal sectional view taken through myV improvedtool showing othe blade in its operative position, and also illustratingthe blade within the contines of the tool in dotted line;

.Figa 2 is a similar View looking in a direc- .tiono,pposite that shownin Fig. 1;

^ be .formed of steel or any other suitable mal terial of this characterand is provided at itspouter end with a slotted portion 2 in which thecutting blade 3 is adapted to operate. Extending longitudinally of thebody. member l and projecting into thevslotted portion 2 at a centralpoint is the longitudinal opening 4 in which'is adapted to slide theoperating rod 5, the outer end of which is pivotally connected to theknife 3 by means of the pivot pin 6. This rod 5 is moved within the'opening e by means of the pin 7 which is connected to the inner end o'the rod 5 in any suitable manner and rlhe outer end of the slottedportion 2 is closed by -means of a cap member 9 which is mounted uponthe reduced outer end 10 of the body member l and provided with a cen-ltral reinforced brace member 1 1, said brace member .being disposed inalinement .with the slot 2 so t at when' the cuttingblade 3 is arrangedin its operative position as shown in l? ig. l the back 'olf the cuttingblade will abut against this brace member 11 and' be securely held inits operative position against the surface being operated upon. The capmember 9 is securely retained in position by means ot the screw `bolt l2which is extended through the side walls of the cap and through thereduced portion l0 or' sev the body member 1 and the bracing member 11.Thus theseveral parts are securely retained in position and can bequickly and readily removed when it' is desired to insert a new knifeblade or *for any otherpurpose of this character.

ln Fig. 1 l have illustrated the cutting blade 3 in an inoperativeposition in dotted lines and it will be noted that the blade when inthis position is entirely within the connes of the body of the tool anddoes not project beyond the outer surface of the body, but in full linesthe blade is illustrated in its operative position and in order to movethe blade from one position to the other, a suitable arcuate groove 13is formed in one face of the slotted portion 2 and the knife blade 3 isprovided with a guide pln 14 adapted to operate within this groove sothat when the pin 7 is grasped by theoperator for imparting slidingmovement "to the rod 5, the knife 3 will be forced inwardly or outwardlyaccording to the movement of the rod and through the movement in eitherdirection, the pin 14 will follow in the groove 13 and when the pinreaches either end of the groove, the knife blade 3 will be either in anoperative or an inoperative position. From. this it will be apparentthat when the pin 14 is in the outer end of the groove the blade 3 willbe disposed in operative position as shown in Fig. 1 in full lines, butwhen the pin is at the inner end of the groove the blade will bedisposed in an inoperative position as shown in dotted lines in Fig. 1.It will be understood that in the construction of various sized toolsand blades, the relative positions of the pivot pin 6, the. pin 14 andthe groove 13 will be changed accordingly so that when the blade 3 isactuated, through the medium of the operatin rod 5, the guide pin 14will follow within t e groove 13 and force the blade 3 eitherto anoperative or an inoperative position. Particular attention is directedto the actvthat when the blade is in its operative position as shown inFig. 1, the outer end of the same abuts against the transverse bracingmember 11 arranged within the end portion 10 of the body and held inplace by the cap 9 so that the force of the cutting of the blade againstthe work, is directed against'this bracing member and thus removing thestrain from the pivot pin 6.

lt will befnoted in Fig. 2 that the operating rod 5- is illustrated in aposition eX- tended `suilicient to bring the knife blade 3 to anoperative position and that the pin 7 has not reached the inner end ofthe slot 3 thus leaving suiieient space between the point to' which thepin is arranged in its present position and the end of the slot tolpermit the rod 5 to be extendedbeyond the operating end or the tool sothat the imite 3 can be removed and a new one inneeaeeo serted. rli"hsoperation is carried out by removing the screw bolt 12 so that the cap 9can be readily removed from the end of the body and permit the blademember 3 to be removed from the slotted portion 2 as the pin 14 canreadily pass out the open end of the slot 13 and as the pivot pin 6 1snot secured to the blade 3 in any way, however the blade can be readilyremoved.

ln order to determine the required depth of countersinking, a suitablescale 15 is arranged upon the outer surface of the body member 1 and insuch a position, that the depth of countersinking can be readily notedby the operator when the thickness of the material through which theblade is inserted is taken into consideration.

From the 'abfove description, taken in connection with the accompanyingdrawings it will be readily apparent that l have provided a simple anddurable tool particularly adapted for .reaming out openings, and whereinthetool is especially used on openings where both sides of the openingsare to be reamed thus eliminating the necessity of the operator movingfrom one side of the object to the other or the assistance of a secondoperator upon the opposite side of the object as the plate 3 can bereadily arranged within the tool as shown in dotted lines in Fig. 1, thetool inserted in the opening and the blade 3 moved to an operativeposition and when the work is finished, the blade 3 can be returned toits inoperative position and the tool withdrawn from the opening.Furthermore, should one of the blades 3 become broken or the operatorwish to remove the same for inserting a newblade, the operation can b equickly and readily carried out. lt will be understood that this toolcan be quickly and readily attached in any suitable mannersto the usualmachine in use at the present time for operating tools of thischaracter.

I claim:

1. A tool of the class described including a body member havin alongitudinal groove therein and a recessed portion at one end, a rodslidable in the groove, a cutting blade pivotally connected to one endof the rod andnormally -disposed in the recess within the confines ofthe body of the tool and means for guiding the blade into a transversedposition with respect to the tool body upon reciprocation ot the rod.

2. A tool ot the ciass described including a body member having alongitudinal groove therein and recessed at one end, a cutting bladepivotally connected to one end of the rod and normally disposed withinthe recessed portion within the confines of the body, an arcuate groovein one side wali o the recess, a guide pin carried by the blade andmora, within said arcuate groove whereby upon reciprocating more ment ofthe rod, the blade will be moved to a transversed position With respectto the body of the tool as and for the purpose set forth. v

3. A tool of the class described including a body, having a recessedportion at one end, a movable cutting blade normally disposed Within therecess and arranged longitudinally of the body, one side Wall of therecess having an arcuate groove, a guide pin carried by the blade andmovable Within said groove and means pivotally connected withthe bladefor actuating the same whereby the blade may be moved either to alongitudinal or a transverse position with respect to .the

body.

4. A tool of the class described including a body member having one endbifurcated, a cutting blade movably arranged within the bifurcation andmeans whereby said blade is operated to dispose the same eitherlongitudinally or transversely of the body of the tool, a removable capmember arranged over the bifurcated end of the body and a bearing memberarranged Within the cap and adapted to be disposed Within the outer endof the bifurcation to form a bearing for one end of the blade whendisposed in a position transversely of the body.

In testimony whereof I affix my signature.

GEORGE MIZZICLL.

